Camera optical lens

ABSTRACT

The present disclosure provides a camera optical lens including, from an object side to an image side in sequence: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens; wherein the first lens has a positive refractive power, and the camera optical lens satisfies conditions of: 0.95≤f/TTL; 3.20≤f2/f≤5.00; and 0.30≤(R7+R8)/(R7−R8)≤1.00. The camera optical lens can achieve good optical performance while meeting the design requirements for large aperture, ultra-thinness and long focal length.

TECHNICAL FIELD

The present disclosure relates to the field of optical lens, particular,to a camera optical lens suitable for handheld devices, such as smartphones and digital cameras, and imaging devices, such as monitors or PClenses.

BACKGROUND

With the emergence of smart phones in recent years, the demand forminiature camera lens is increasing day by day, but in general thephotosensitive devices of camera lens are nothing more than ChargeCoupled Device (CCD) or Complementary Metal-Oxide Semiconductor Sensor(CMOS sensor), and as the progress of the semiconductor manufacturingtechnology makes the pixel size of the photosensitive devices becomesmaller, plus the current development trend of electronic productstowards better functions and thinner and smaller dimensions, miniaturecamera lens with good imaging quality therefore have become a mainstreamin the market.

In order to obtain better imaging quality, the lens that istraditionally equipped in mobile phone cameras adopts a three-piece,four-piece, or even five-piece or six-piece lens structure. However,with the development of technology and the increase of the diversedemands of users, and as the pixel area of photosensitive devices isbecoming smaller and smaller and the requirement of the system on theimaging quality is improving constantly, the eight-piece lens structuregradually appears in lens designs. Although the typical eight-piece lensalready has good optical performance, its optical power, lens spacingand lens shape remain unreasonable to some extents, resulting in thatthe lens structure, which, even though, has excellent opticalperformance, is not able to meet the design requirement for largeaperture, ultra-thinness and long focal length.

Thus, there is a need to provide a camera optical lens having excellentoptical performance and meeting the design requirement for largeaperture, long focal length and ultra-thinness.

SUMMARY

To address the above issues, an object of the present disclosure is toprovide a camera optical lens that meets a design requirement of largeaperture, ultra-thinness and long focal length while having excellentoptical performance.

The technical solution of the present disclosure is as follows. A cameraoptical lens is provided, including, from an object side to an imageside in sequence: a first lens, a second lens, a third lens, a fourthlens, a fifth lens, a sixth lens, a seventh lens, and an eighth lens;the first lens has a positive refractive power, and the camera opticallens satisfies conditions of: 0.95≤f/TTL; 3.20≤f2/f≤5.00; and0.30≤(R7+R8)/(R7−R8)≤1.00; where f denotes a focal length of the cameraoptical lens; f2 denotes a focal length of the second lens; R7 denotes acentral curvature radius of an object-side surface of the fourth lens;R8 denotes a central curvature radius of an image-side surface of thefourth lens; and TTL denotes a total optical length from an object-sidesurface of the first lens to an image surface of the camera optical lensalong an optical axis.

As an improvement, the camera optical lens further satisfies a conditionof: −6.00≤R16/R15≤−2.50; where R15 denotes a central curvature radius ofan object-side surface of the eighth lens; and R16 denotes a centralcurvature radius of an image-side surface of the eighth lens.

As an improvement, the camera optical lens further satisfies conditionsof: 0.34≤f1/f≤1.06; −2.75≤(R1+R2)/(R1−R2)≤−0.87; and 0.06≤d1/TTL≤0.18;where f1 denotes a focal length of the first lens; R1 denotes a centralcurvature radius of the object-side surface of the first lens; R2denotes a central curvature radius of an image-side surface of the firstlens; and d1 denotes an on-axis thickness of the first lens.

As an improvement, the camera optical lens further satisfies conditionsof: −9.29≤(R3+R4)/(R3−R4)≤−1.81; and 0.02≤d3/TTL≤0.06; where R3 denotesa central curvature radius of the object-side surface of the secondlens; R4 denotes a central curvature radius of the image-side surface ofthe second lens; and d3 denotes an on-axis thickness of the second lens.

As an improvement, the camera optical lens further satisfies conditionsof: −2.55≤f3/f≤−0.82; 0.70≤(R5+R6)/(R5−R6)≤2.16; and 0.02≤d5/TTL≤0.07;where f3 denotes a focal length of the third lens; R5 denotes a centralcurvature radius of an object-side surface of the third lens; R6 denotesa central curvature radius of an image-side surface of the third lens;and d5 denotes an on-axis thickness of the third lens.

As an improvement, the camera optical lens further satisfies conditionsof: −15.56≤f4/f≤−3.83; and 0.03≤d7/TTL≤0.08; where f4 denotes a focallength of the fourth lens; and d7 denotes an on-axis thickness of thefourth lens.

As an improvement, the camera optical lens further satisfies followingconditions: 3.48≤f5/f≤11.42; −23.06≤(R9+R10)/(R9−R10)≤−6.45; and0.03≤d9/TTL≤0.10; where f5 denotes a focal length of the fifth lens; R9denotes a central curvature radius of an object-side surface of thefifth lens; R10 denotes a central curvature radius of an image-sidesurface of the fifth lens; and d9 denotes an on-axis thickness of thefifth lens.

As an improvement, the camera optical lens further satisfies a conditionof: 6.68≤f6/f≤21.63; 5.03≤(R11+R12)/(R11−R12)≤17.91; and0.02≤d11/TTL≤0.07; where f6 denotes a focal length of the sixth lens;R11 denotes a central curvature radius of an object-side surface of thesixth lens; R12 denotes a central curvature radius of an image-sidesurface of the sixth lens; and d11 denotes an on-axis thickness of thesixth lens.

As an improvement, the camera optical lens further satisfies a conditionof: 1.42≤f7/f≤4.86; 1.08≤(R13+R14)/(R13−R14)≤3.46; and0.02≤d13/TTL≤0.07; where f7 denotes a focal length of the seventh lens;R13 denotes a central curvature radius of an object-side surface of theseventh lens; R14 denotes a central curvature radius of an image-sidesurface of the seventh lens; and d13 denotes an on-axis thickness of theseventh lens.

As an improvement, the camera optical lens further satisfies a conditionof: −1.72≤f8/f≤−0.55; −1.41≤(R15+R16)/(R15−R16)≤−0.29; and0.04≤d15/TTL≤0.12; where f8 denotes a focal length of the eighth lens;R15 denotes a central curvature radius of an object-side surface of theeighth lens; R16 denotes a central curvature radius of an image-sidesurface of the eighth lens; and d15 denotes an on-axis thickness of theeighth lens.

The present disclosure is advantageous in: the camera optical lens inthe present disclosure has good optical performance and hascharacteristics of large aperture, long focal length and ultra-thinness,and is especially applicable to mobile phone camera lens assemblies andWEB camera lenses composed by such camera elements as CCD and CMOS forhigh pixels.

BRIEF DESCRIPTION OF DRAWINGS

To illustrate the technical solutions according to the embodiments ofthe present disclosure or in the prior art more clearly, theaccompanying drawings for describing the embodiments or the prior artare introduced briefly in the following. Apparently, the accompanyingdrawings in the following description are only some embodiments of thepresent disclosure, and persons of ordinary skill in the art can deriveother drawings from the accompanying drawings without creative efforts.

FIG. 1 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 1 of the present disclosure.

FIG. 2 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 1 .

FIG. 3 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 1 .

FIG. 4 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 1 .

FIG. 5 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 2 of the present disclosure.

FIG. 6 is a schematic diagram of a longitudinal aberration of the cameraoptical lens shown in FIG. 5 .

FIG. 7 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 5 .

FIG. 8 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 5 .

FIG. 9 is a schematic diagram of a structure of a camera optical lensaccording to Embodiment 3 of the present disclosure.

FIG. 10 is a schematic diagram of a longitudinal aberration of thecamera optical lens shown in FIG. 9 .

FIG. 11 is a schematic diagram of a lateral color of the camera opticallens shown in FIG. 9 .

FIG. 12 is a schematic diagram of a field curvature and a distortion ofthe camera optical lens shown in FIG. 9 .

DETAILED DESCRIPTION OF EMBODIMENTS

The present disclosure will be further described below with reference tothe drawings and embodiments.

To make the objects, technical solutions, and advantages of the presentdisclosure clearer, embodiments of the present disclosure are describedin detail with reference to accompanying drawings in the following. Aperson of ordinary skill in the art can understand that, in theembodiments of the present disclosure, many technical details areprovided to make readers better understand the present disclosure.However, even without these technical details and any changes andmodifications based on the following embodiments, technical solutionsrequired to be protected by the present disclosure can be implemented.

Embodiment 1

Referring to the accompanying drawing, the present disclosure provides acamera optical lens 10. FIG. 1 shows a camera optical lens 10 ofEmbodiment 1 of the present disclosure. In FIG. 1 , an object siderefers to the left side, an image side refers to the right side, and thecamera optical lens 10 includes eight lenses, from the object side tothe image side in sequence: an aperture S1, a first lens L1, a secondlens L2, a third lens L3, a fourth lens L4, a fifth lens L5, a sixthlens L6, a seventh lens L7 and an eighth lens L8. An optical elementsuch as an optical filter GF can be arranged between the eighth lens L8and an image surface Si.

In this embodiment, the first lens L1, the second lens L2, the thirdlens L3, the fourth lens L4, the fifth lens L5, the sixth lens L6, theseventh lens L7 and the eighth lens L8 are made of plastic material. Inother embodiments, the lenses may be made of other material.

In this embodiment, the first lens L1 has a positive refractive power,the second lens L2 has a positive refractive power, the third lens L3has a negative refractive power, the fourth lens L4 has a negativerefractive power, the fifth lens L5 has a positive refractive power, thesixth lens L6 has a positive refractive power, the seventh lens L7 has apositive refractive power and the eighth lens L8 has a negativerefractive power. It should be appreciated that, in other embodiments,the third lens L3, the fourth lens L4, the fifth lens L5, the sixth lensL6, the seventh lens L7 and the eighth lens L8 may have other refractivepowers than those of this embodiment.

In this embodiment, the first lens L1 has a positive refractive power,which facilitates improving performance of the camera optical lens.

In this embodiment, a focal length of the camera optical lens 10 isdefined as f, a focal length of the second lens L2 is defined as f2, acentral curvature radius of the object-side surface of the fourth lensL4 is defined as R7, a central curvature radius of the image-sidesurface of the fourth lens L4 is defined as R8 and a total opticallength from the object-side surface of the first lens L1 to an imagesurface S1 of the camera optical lens 10 along an optical axis isdefined as TTL. The camera optical lens 10 satisfies conditions of:0.95≤f/TTL;  (1)3.20≤f2/f≤5.00; and  (2)0.30≤(R7+R8)/(R7−R8)≤1.00.  (3)

Condition (1) specifies a ratio of the focal length of the cameraoptical lens 10 and the total optical length of the camera optical lens10. Given a same total optical length TTL, the camera optical lens 10has the focal length longer.

Condition (2) specifies a ratio of the focal length of the second lensL2 to the focal length of the camera optical lens 10. Within thiscondition, a spherical aberration and a field curvature of the cameraoptical lens can be effectively balanced.

Condition (3) specifies a shape of the fourth lens L4. Within thiscondition, the deflection degree of the light passing through the lenscan be alleviated, and the aberration can be effectively reduced.

A central curvature radius of the object-side surface of the eighth lensL8 is defined as R15, and a central curvature radius of the image-sidesurface of the eighth lens L8 is defined as R16. The camera optical lens10 satisfies a condition of −6.00≤R16/R15≤−2.50, which specifies a shapeof the eighth lens L8. Within this condition, correction of the off-axisaberration is facilitated.

In this embodiment, the first lens L1 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the first lens is defined as f1. The camera optical lens10 satisfies a condition of 0.34≤f1/f≤1.06, which specifies a ratio ofthe focal length of the first lens L1 to the focal length of the cameraoptical lens 10. Within this condition, the first lens L1 has anappropriate positive refractive power, and the correction of theaberration of the camera optical lens is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of 0.54≤f1/f≤0.85.

A central curvature radius of an object-side surface of the first lensL1 is defined as R1, and a central curvature radius of an image-sidesurface of the first lens L1 is defined as R2. The camera optical lens10 satisfies a condition of −2.75≤(R1+R2)/(R1−R2)≤−0.87. This canreasonably control a shape of the first lens L1 in such a manner thatthe first lens L1 can effectively correct a spherical aberration of thecamera optical lens. Preferably, the camera optical lens 10 satisfies acondition of −1.72≤(R1+R2)/(R1−R2)≤−1.09.

An on-axis thickness of the first lens L1 is defined as d1 and the totaloptical length of the camera optical lens 10 is defined as TTL. Thecamera optical lens 10 satisfies a condition of 0.06≤d1/TTL≤0.18. Withinthis condition, ultra-thinness of the lenses is facilitated. Preferably,the camera optical lens 10 satisfies a condition of 0.09≤d1/TTL≤0.14.

In this embodiment, the second lens L2 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region.

A central curvature radius of the object-side surface of the second lensL2 is defined as R3, and a central curvature radius of the image-sidesurface of the second lens L2 is defined as R4. The camera optical lens10 satisfies a condition of −9.29≤(R3+R4)/(R3−R4)≤−1.81, which specifiesa shape of the second lens L2. Within this condition, correction of theon-axis chromatic aberration is facilitated. Preferably, the cameraoptical lens 10 satisfies a condition of −5.81≤(R3+R4)/(R3−R4)≤−2.27.

An on-axis thickness of the second lens L2 is defines as d3, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d3/TTL≤0.06.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.03≤d3/TTL≤0.05.

In this embodiment, the third lens L3 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region.

A focal length of the third lens L3 is defined as f3, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of −2.55≤f3/f≤−0.82. With reasonabledistribution of the refractive power, the camera optical lens has betterimaging quality and lower sensitivity. Preferably, the camera opticallens 10 satisfies a condition of −1.59≤f3/f≤−1.03.

A central curvature radius of the object-side surface of the third lensL3 is defined as R5, and a central curvature radius of the image-sidesurface of the third lens L3 is defined as R6. The camera optical lens10 satisfies a condition of 0.70≤(R5+R6)/(R5−R6)≤2.16, which specifies ashape of the third lens L3. Within this condition, the deflection degreeof the light passing through the lens can be alleviated, and theaberration can be effectively reduced. Preferably, the camera opticallens 10 satisfies a condition of 1.12≤(R5+R6)/(R5−R6)≤1.73.

An on-axis thickness of the third lens L3 is defined as d5, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d5/TTL≤0.07.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.03≤d5/TTL≤0.05.

In this embodiment, the fourth lens L4 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconcave in the paraxial region.

A focal length of the fourth lens L4 is defined as f4, and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of −15.56≤f4/f≤−3.83, which specifies aratio of the focal length of the fourth lens L4 and the focal length ofthe camera optical lens 10. Within this condition, improvement of theperformance of the camera optical lens is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of −9.73≤f4/f≤−4.79.

An on-axis thickness of the fourth lens L4 is defined as d7, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.03≤d7/TTL≤0.08.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.04≤d7/TTL≤0.06.

In this embodiment, the fifth lens L5 includes an object-side surfacebeing convex in a paraxial region and an image-side surface beingconcave in the paraxial region.

A focal length of the fifth lens L5 is defined as f5 and the focallength of the camera optical lens 10 is defined as f. The camera opticallens 10 satisfies a condition of 3.48≤f5/f≤11.42, which specifies thefifth lens L5 so as to enable the light angle of the camera optical lens10 to be gradual and reduce the tolerance sensitivity. Preferably, thecamera optical lens 10 satisfies a condition of 5.56≤f5/f≤9.14.

A central curvature radius of the object-side surface of the fifth lensL5 is defined as R9, and a central curvature radius of the image-sidesurface of the fifth lens L5 is defined as R10. The camera optical lens10 satisfies a condition of −23.06≤(R9+R10)/(R9−R10)≤−6.45, whichspecifies a shape of the fifth lens L5. Within this condition, thecorrection of the off-axis aberration is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of−14.41≤(R9+R10)/(R9−R10)≤−8.07.

An on-axis thickness of the fifth lens L5 is defined as d9, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.03≤d9/TTL≤0.10.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.05≤d9/TTL≤0.08.

In this embodiment, the sixth lens L6 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconvex in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the sixth lens L6 is defined as f6. The camera opticallens 10 satisfies a condition of 6.68≤f6/f≤21.63. With reasonabledistribution of the refractive power, the camera optical lens has betterimaging quality and lower sensitivity. Preferably, the camera opticallens 10 satisfies a condition of 10.69≤f6/f≤17.31.

A central curvature radius of an object-side surface of the sixth lensL6 is defined as R11, and a central curvature radius of an image-sidesurface of the sixth lens L6 is defined as R12. The camera optical lens10 satisfies a condition of 5.03≤(R11+R12)/(R11−R12)≤17.91, whichspecifies a shape of the sixth lens L6. Within this condition,correction of the off-axis aberration is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of8.05≤(R11+R12)/(R11−R12)≤14.33.

An on-axis thickness of the sixth lens L6 is defined as d11, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d11/TTL≤0.07.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.04≤d11/TTL≤0.06.

In this embodiment, the seventh lens L7 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconvex in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the seventh lens L7 is defined as f7. The camera opticallens 10 satisfies a condition of 1.42≤f7/f≤4.86. With reasonabledistribution of the refractive power, the camera optical lens has betterimaging quality and lower sensitivity. Preferably, the camera opticallens 10 satisfies a condition of 2.27≤f7/f≤3.89.

A central curvature radius of the object-side surface of the seventhlens L7 is defined as R13, and a central curvature radius of theimage-side surface of the seventh lens L7 is defined as R14. The cameraoptical lens 10 satisfies a condition of 1.08≤(R13+R14)/(R13−R14)≤3.46,which specifies a shape of the seventh lens L7. Within this condition,correction of the off-axis aberration is facilitated. Preferably, thecamera optical lens 10 satisfies a condition of1.73≤(R13+R14)/(R13−R14)≤2.76.

An on-axis thickness of the seventh lens L7 is defined as d13, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.02≤d13/TTL≤0.07.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.04≤d13/TTL≤0.06.

In this embodiment, the eighth lens L8 includes an object-side surfacebeing concave in a paraxial region and an image-side surface beingconcave in the paraxial region.

The focal length of the camera optical lens 10 is defined as f, and afocal length of the eighth lens L8 is defined as f8. The camera opticallens 10 satisfies a condition of −1.72≤f8/f≤−0.55. With reasonabledistribution of the refractive power, the camera optical lens has betterimaging quality and lower sensitivity. Preferably, the camera opticallens 10 satisfies a condition of −1.07≤f8/f≤−0.69.

The central curvature radius of the object-side surface of the eighthlens L8 is defined as R15, and the central curvature radius of theimage-side surface of the eighth lens L8 is defined as R16. The cameraoptical lens 10 satisfies a condition of−1.41≤(R15+R16)/(R15−R16)≤−0.29, which specifies a shape of the eighthlens L8. Within this condition, the development of the lenses towardsultra-thinness would facilitate correcting the off-axis aberration.Preferably, the camera optical lens 10 satisfies a condition of−0.88≤(R15+R16)/(R15−R16)≤−0.37.

An on-axis thickness of the eighth lens L8 is defined as d15, and thetotal optical length of the camera optical lens 10 is defined as TTL.The camera optical lens 10 satisfies a condition of 0.04≤d15/TTL≤0.12.Within this condition, ultra-thinness of the lenses is facilitated.Preferably, the camera optical lens 10 satisfies a condition of0.06≤d15/TTL≤0.10.

It should be appreciated that, in other embodiments, configuration ofthe object-side surfaces and the image-side surfaces of the first lensL1, the second lens L2, the third lens L3, the fourth lens L4, the fifthlens L5, the sixth lens L6, the seventh lens L7 and the eighth lens L8may have a distribution in convex and concave other than that of theabove-discussed embodiment.

In this embodiment, an F number of the camera optical lens 10 is definedas FNO, and the camera optical lens 10 satisfies a condition ofFNO≤2.00. This facilitates achieving large aperture and excellentimaging performance of the camera optical lens 10.

In this embodiment, the total optical length of the camera optical lens10 is defined as TTL, and an image height of the camera optical lens 10is defined as IH. The camera optical lens 10 satisfies a condition ofTTL/IH≤2.17, which facilitates ultra-thinness of the lenses.

In this embodiment, the focal length of the camera optical lens 10 isdefined as f, and the image height of the camera optical lens 10 isdefined as IH. The camera optical lens 10 satisfies a condition off/IH≥2.09, which facilitates achieving long focal length.

In this embodiment, the focal length of the camera optical lens 10 isdefined as f, and a combined focal length of the first lens L1 and ofthe second lens L2 is defined as f12. The camera optical lens 10satisfies a condition of 0.30≤f12/f≤0.92. Within this condition, theaberration and distortion of the camera optical lens 10 can beeliminated and a back focal length of the camera optical lens isreduced, thereby maintaining miniaturization of the camera optical lens.Preferably, the camera optical lens 10 satisfies a condition of0.47≤f12/f≤0.73.

When the focal length of the camera optical lens 10 as well as the focallength and central curvature radius of each lens satisfy the aboverelationships, the camera optical lens 10 meets the design requirementsof large aperture, ultra-thinness and long focal length while havingexcellent optical imaging performance. Based on the characteristics ofthe camera optical lens 10, the camera optical lens 10 is particularlyapplicable to mobile camera lens assemblies and a WEB camera lensescomposed of such camera elements as CCD and CMOS for high pixels.

The camera optical lens 10 will be further described with reference tothe following examples. Symbols used in various examples are shown asfollows. The focal length, on-axis distance, central curvature radius,on-axis thickness, inflexion point position, and arrest point positionare all in units of mm.

TTL: Total optical length (the distance from the object-side surface ofthe first lens L1 to the image surface S1 of the camera optical lensalong the optical axis) in mm.

FNO: ratio of an effective focal length and an entrance pupil diameterof the camera optical lens.

In addition, inflexion points and/or arrest points can be arranged on atleast one of the object-side surface and/or the image-side surface ofeach lens, so as to satisfy the demand for high quality imaging. Thedescription below can be referred for specific implementations.

The design data of the camera optical lens 10 in Embodiment 1 of thepresent disclosure are shown in Table 1 and Table 2.

TABLE 1 R d nd νd S1 ∞ d0= −0.503 R1 1.743 d1= 0.638 nd1 1.5444 ν1 55.82R2 11.418 d2= 0.050 R3 5.288 d3= 0.200 nd2 1.5444 ν2 55.82 R4 9.390 d4=0.052 R5 20.433 d5= 0.234 nd3 1.6701 ν3 19.39 R6 3.684 d6= 0.166 R7−18563.854 d7= 0.284 nd4 1.5444 ν4 55.82 R8 18.656 d8= 0.245 R9 4.951d9= 0.362 nd5 1.6400 ν5 23.54 R10 6.092 d10= 0.337 R11 −11.021 d11=0.266 nd6 1.6701 ν6 19.39 R12 −9.028 d12= 0.321 R13 −14.06 d13= 0.260nd7 1.5444 ν7 55.82 R14 −5.18 d14= 0.775 R15 −3.255 d15= 0.442 nd81.5346 ν8 55.69 R16 8.392 d16= 0.275 R17 ∞ d17= 0.110 ndg 1.5168 νg64.17 R18 ∞ d18= 0.383

In the table, meanings of various symbols will be described as follows.

-   -   S1: aperture;    -   R: central curvature radius of an optical surface;    -   R1: central curvature radius of the object-side surface of the        first lens L1;    -   R2: central curvature radius of the image-side surface of the        first lens L1;    -   R3: central curvature radius of the object-side surface of the        second lens L2;    -   R4: central curvature radius of the image-side surface of the        second lens L2;    -   R5: central curvature radius of the object-side surface of the        third lens L3;    -   R6: central curvature radius of the image-side surface of the        third lens L3;    -   R7: central curvature radius of the object-side surface of the        fourth lens L4;    -   R8: central curvature radius of the image-side surface of the        fourth lens L4;    -   R9: central curvature radius of the object-side surface of the        fifth lens L5;    -   R10: central curvature radius of the image-side surface of the        fifth lens L5;    -   R11: central curvature radius of the object-side surface of the        sixth lens L6;    -   R12: central curvature radius of the image-side surface of the        sixth lens L6;    -   R13: central curvature radius of the object-side surface of the        seventh lens L7;    -   R14: central curvature radius of the image-side surface of the        seventh lens L7;    -   R15: central curvature radius of an object-side surface of the        eighth lens L8;    -   R16: central curvature radius of an image-side surface of the        eighth lens L8;    -   R17: central curvature radius of an object-side surface of the        optical filter GF;    -   R18: central curvature radius of an image-side surface of the        optical filter GF;    -   d: on-axis thickness of a lens and an on-axis distance between        lenses;    -   d0: on-axis distance from the aperture S1 to the object-side        surface of the first lens L1;    -   d1: on-axis thickness of the first lens L1;    -   d2: on-axis distance from the image-side surface of the first        lens L1 to the object-side surface of the second lens L2;    -   d3: on-axis thickness of the second lens L2;    -   d4: on-axis distance from the image-side surface of the second        lens L2 to the object-side surface of the third lens L3;    -   d5: on-axis thickness of the third lens L3;    -   d6: on-axis distance from the image-side surface of the third        lens L3 to the object-side surface of the fourth lens L4;    -   d7: on-axis thickness of the fourth lens L4;    -   d8: on-axis distance from the image-side surface of the fourth        lens L4 to the object-side surface of the fifth lens L5;    -   d9: on-axis thickness of the fifth lens L5;    -   d10: on-axis distance from the image-side surface of the fifth        lens L5 to the object-side surface of the sixth lens L6;    -   d11: on-axis thickness of the sixth lens L6;    -   d12: on-axis distance from the image-side surface of the sixth        lens L6 to the object-side surface of the seventh lens L7;    -   d13: on-axis thickness of the seventh lens L7;    -   d14: on-axis distance from the image-side surface of the seventh        lens L7 to the object-side surface of the eighth lens L8;    -   d15: on-axis thickness of the eighth lens L8;    -   d16: on-axis distance from the image-side surface of the eighth        lens L8 to the object-side surface of the optical filter GF;    -   d17: on-axis thickness of the optical filter GF;    -   d18: on-axis distance from the image-side surface of the optical        filter GF to the image surface Si;    -   nd: refractive index of the d line;    -   nd1: refractive index of the d line of the first lens L1;    -   nd2: refractive index of the d line of the second lens L2;    -   nd3: refractive index of the d line of the third lens L3;    -   nd4: refractive index of the d line of the fourth lens L4;    -   nd5: refractive index of the d line of the fifth lens L5;    -   nd6: refractive index of the d line of the sixth lens L6;    -   nd7: refractive index of the d line of the seventh lens L7;    -   nd8: refractive index of the d line of the eighth lens L8;    -   ndg: refractive index of the d line of the optical filter GF;    -   vd: abbe number;    -   v1: abbe number of the first lens L1;    -   v2: abbe number of the second lens L2;    -   v3: abbe number of the third lens L3;    -   v4: abbe number of the fourth lens L4;    -   v5: abbe number of the fifth lens L5;    -   v6: abbe number of the sixth lens L6;    -   v7: abbe number of the seventh lens L7;    -   v8: abbe number of the eighth lens L8;    -   vg: abbe number of the optical filter GF.

Table 2 shows aspheric surface data of the camera optical lens 10 inEmbodiment 1 of the present disclosure.

TABLE 2 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −9.8966E−01  1.7462E−02 −9.5211E−03   6.5829E−02 −1.7257E−01  2.6870E−01 R2  2.4928E+01  7.9194E−03 −1.4567E−03  −1.9017E−03−9.3442E−04  −5.2570E−04 R3  5.1019E−01  2.5174E−03 −4.9857E−03 −5.1148E−03 −1.9918E−03   4.5003E−04 R4 −1.4920E+02 −5.0887E−021.9070E−01 −4.0959E−01 6.3048E−01 −7.2469E−01 R5 −7.9467E+02 −5.7401E−022.9265E−01 −6.0919E−01 9.3828E−01 −1.0607E+00 R6  2.9327E+00 −3.8025E−022.1026E−01 −4.6982E−01 1.0119E+00 −1.7142E+00 R7  1.0000E+03  1.5657E−021.6982E−01 −3.6566E−01 9.1374E−01 −1.4420E+00 R8  1.9232E+02 −5.3590E−031.2145E−01 −2.0241E−02 −3.0425E−01   1.3771E+00 R9 −3.0339E+01−1.1897E−01 9.0695E−02 −3.6841E−01 1.3524E+00 −3.2220E+00 R10−4.1179E+01 −1.2836E−01 4.5648E−02 −3.2693E−01 1.1064E+00 −2.2353E+00R11 −1.9793E+01 −8.7291E−02 −2.2300E−01   8.1785E−01 −2.3362E+00  4.2603E+00 R12  7.5045E+00 −7.1885E−02 −1.0353E−01   2.7921E−01−4.6351E−01   5.4658E−01 R13 −9.9062E+02 −1.0933E−01 −5.8309E−02  3.1207E−02 8.7659E−02 −1.9198E−01 R14  5.2484E+00 −1.0145E−02−1.2089E−01   1.4594E−01 −1.2082E−01   7.5573E−02 R15 −1.9974E+00−7.6926E−02 2.6402E−02 −3.1751E−03 4.4823E−04 −1.0986E−04 R16−1.6659E+02 −6.2214E−02 1.7640E−02 −4.0670E−03 7.4975E−04 −1.4150E−04Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1−9.8966E−01 −2.5901E−01   1.4976E−01 −4.7543E−02   6.3130E−03 R2 2.4928E+01 −1.9437E−04   2.6754E−04 4.8110E−06  9.9602E−06 R3 5.1019E−01 1.0677E−03  4.7039E−04 1.1895E−05  1.3373E−05 R4 −1.4920E+026.2353E−01 −3.5679E−01 1.1558E−01 −1.5724E−02 R5 −7.9467E+02 9.0366E−01−5.2807E−01 1.7869E−01 −2.5992E−02 R6  2.9327E+00 2.2801E+00 −1.9560E+009.0421E−01 −1.7182E−01 R7  1.0000E+03 1.6008E+00 −1.1501E+00 4.5021E−01−6.9539E−02 R8  1.9232E+02 −2.9733E+00   3.5598E+00 −2.2330E+00  5.7394E−01 R9 −3.0339E+01 4.9176E+00 −4.5924E+00 2.3751E+00 −5.2333E−01R10 −4.1179E+01 2.7733E+00 −2.0689E+00 8.4784E−01 −1.4731E−01 R11−1.9793E+01 −4.8870E+00   3.3841E+00 −1.2891E+00   2.0782E−01 R12 7.5045E+00 −4.3440E−01   2.1258E−01 −5.5812E−02   5.8728E−03 R13−9.9062E+02 1.9280E−01 −1.1054E−01 3.3356E−02 −3.9723E−03 R14 5.2484E+00 −3.2128E−02   8.0691E−03 −1.0177E−03   5.4979E−05 R15−1.9974E+00 3.0332E−05 −3.9448E−06 6.6130E−08  1.9135E−09 R16−1.6659E+02 2.5915E−05 −2.9883E−06 1.9534E−07 −5.2405E−09

In table 2, K is a conic coefficient, and A4, A6, A8, A10, A12, A14,A16, A18 and A20 are aspheric surface coefficients.y=(x ² /R)/{1+[1−(k+1)(x ² /R ²)]^(1/2) }+A4x ⁴ +A6x ⁶ +A8x ⁸ +A10x ¹⁰+A12x ¹² +A14x ¹⁴ +A16x ¹⁶ +A18x ¹⁸ +A20x ²⁰  (4)

Herein, x denotes a vertical distance between a point in the asphericcurve and the optical axis, and y denotes an aspheric depth (i.e. avertical distance between the point having a distance of x from theoptical axis and a plane tangent to the vertex on the optical axis ofthe aspheric surface).

For convenience, an aspheric surface of each lens surface uses theaspheric surfaces shown in the above formula (1). However, the presentdisclosure is not limited to the aspherical polynomials form shown inthe formula (1).

Table 3 and Table 4 show design data of inflexion points and arrestpoints of each lens of the camera optical lens 10 according toEmbodiment 1. P1R1 and P1R2 represent the object-side surface and theimage-side surface of the first lens L1, P2R1 and P2R2 represent theobject-side surface and the image-side surface of the second lens L2,P3R1 and P3R2 represent the object-side surface and the image-sidesurface of the third lens L3, P4R1 and P4R2 represent the object-sidesurface and the image-side surface of the fourth lens L4, P5R1 and P5R2represent the object-side surface and the image-side surface of thefifth lens L5, P6R1 and P6R2 represent the object-side surface and theimage-side surface of the sixth lens L6, P7R1 and P7R2 represent theobject-side surface and the image-side surface of the seventh lens L7,and P8R1 and P8R2 represent the object-side surface and the image-sidesurface of the eighth lens L8. The data in the column named “inflexionpoint position” refers to vertical distances from inflexion pointsarranged on each lens surface to the optic axis of the camera opticallens 10. The data in the column named “arrest point position” refers tovertical distances from arrest points arranged on each lens surface tothe optical axis of the camera optical lens 10.

TABLE 3 Number(s) of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 1 1.225 / P1R2 2 0.965 1.275 P2R1 2 0.9051.005 P2R2 0 / / P3R1 1 1.155 / P3R2 0 / / P4R1 1 0.025 / P4R2 0 / /P5R1 1 0.365 / P5R2 1 0.315 / P6R1 0 / / P6R2 1 1.205 / P7R1 1 1.335 /P7R2 1 1.415 / P8R1 1 1.385 / P8R2 2 0.355 1.995

TABLE 4 Number(s) of arrest Arrest point points position 1 P1R1 0 / P1R20 / P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 0.025 P4R2 0 / P5R1 10.655 P5R2 1 0.535 P6R1 0 / P6R2 0 / P7R1 0 / P7R2 0 / P8R1 0 / P8R2 10.635

In the subsequent Table 13, various parameters of Embodiments 1, 2 and 3and values corresponding to the parameters specified in the aboveconditions are shown.

As shown in Table 13, Embodiment 1 satisfies the various conditions.

FIG. 2 and FIG. 3 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and436 nm after passing the camera optical lens 10 in Embodiment 1,respectively. FIG. 4 illustrates a schematic diagram of a fieldcurvature and a distortion with a wavelength of 546 nm after passing thecamera optical lens 10 in Embodiment 1. A field curvature S in FIG. 4 isa field curvature in a sagittal direction, and T is a field curvature ina tangential direction.

In this Embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 10 is 2.615 mm, an image height (IH) of 1.0 H is 2.500 mm,and a field of view (FOV) in a diagonal direction is 50.50°. Thus, thecamera optical lens 10 achieves large aperture, ultra-thinness and longfocal length, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

Embodiment 2

Embodiment 2, which provides a camera optical lens 20 structurally shownin FIG. 5 , is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 5 and Table 6 show design data of a camera optical lens 20 inEmbodiment 2 of the present disclosure.

TABLE 5 R d nd νd S1 ∞ d0= −0.503 R1 1.748 d1= 0.633 nd1 1.5444 ν1 55.82R2 11.095 d2= 0.050 R3 4.992 d3= 0.203 nd2 1.5444 ν2 55.82 R4 10.795 d4=0.052 R5 22.000 d5= 0.229 nd3 1.6701 ν3 19.39 R6 3.682 d6= 0.172 R7−96.452 d7= 0.281 nd4 1.5444 ν4 55.82 R8 19.892 d8= 0.249 R9 5.376 d9=0.362 nd5 1.6400 ν5 23.54 R10 6.611 d10= 0.342 R11 −10.157 d11= 0.268nd6 1.6701 ν6 19.39 R12 −8.533 d12= 0.320 R13 −13.827 d13= 0.250 nd71.5444 ν7 55.82 R14 −5.384 d14= 0.762 R15 −2.925 d15= 0.425 nd8 1.5346ν8 55.69 R16 11.951 d16= 0.276 R17 ∞ d17= 0.110 ndg 1.5168 νg 64.17 R18∞ d18= 0.384

Table 6 shows aspheric surface data of each lens of the camera opticallens 20 in Embodiment 2 of the present disclosure.

TABLE 6 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −9.9489E−01  1.7352E−02 −9.4856E−03   6.5863E−02 −1.7258E−01  2.6871E−01 R2  2.0371E+01  7.1216E−03 −1.7406E−03  −1.9638E−03−9.5162E−04  −5.2365E−04 R3  2.0966E−01  1.9847E−03 −5.0488E−03 −5.2287E−03 −2.0788E−03   4.0248E−04 R4 −1.4490E+02 −5.0657E−021.9055E−01 −4.0959E−01 6.3056E−01 −7.2462E−01 R5 −3.4462E+02 −5.8758E−022.9181E−01 −6.0928E−01 9.3840E−01 −1.0605E+00 R6  2.8378E+00 −3.8475E−022.1122E−01 −4.6940E−01 1.0123E+00 −1.7144E+00 R7 −1.0000E+03  1.7912E−021.7315E−01 −3.6536E−01 9.1257E−01 −1.4425E+00 R8  2.4535E+02  1.3197E−031.1981E−01 −2.0949E−02 −3.0375E−01   1.3776E+00 R9 −2.9217E+01−1.1894E−01 9.2162E−02 −3.6792E−01 1.3521E+00 −3.2215E+00 R10−4.1418E+01 −1.2783E−01 4.5781E−02 −3.2654E−01 1.1069E+00 −2.2357E+00R11 −4.2960E+01 −8.5502E−02 −2.2358E−01   8.1820E−01 −2.3369E+00  4.2599E+00 R12 −1.1321E−01 −7.0453E−02 −1.0269E−01   2.7784E−01−4.6365E−01   5.4676E−01 R13 −8.8011E+02 −1.1694E−01 −5.9162E−02  3.1858E−02 8.8004E−02 −1.9188E−01 R14  6.1402E+00 −1.4707E−02−1.2031E−01   1.4673E−01 −1.2065E−01   7.5661E−02 R15 −2.5715E+00−7.7336E−02 2.5483E−02 −3.2592E−03 4.7408E−04 −9.7740E−05 R16−4.3763E+02 −6.4549E−02 1.7428E−02 −4.0900E−03 7.4687E−04 −1.4290E−04Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1−9.9489E−01 −2.5900E−01   1.4977E−01 −4.7547E−02   6.3090E−03 R2 2.0371E+01 −1.8749E−04   2.6775E−04 2.5849E−06  5.0593E−06 R3 2.0966E−01 1.0589E−03  4.9303E−04 1.3174E−05  1.9052E−05 R4 −1.4490E+026.2357E−01 −3.5676E−01 1.1558E−01 −1.5728E−02 R5 −3.4462E+02 9.0374E−01−5.2811E−01 1.7867E−01 −2.6011E−02 R6  2.8378E+00 2.2799E+00 −1.9560E+009.0416E−01 −1.7178E−01 R7 −1.0000E+03 1.6010E+00 −1.1503E+00 4.5030E−01−6.9500E−02 R8  2.4535E+02 −2.9736E+00   3.5593E+00 −2.2330E+00  5.7355E−01 R9 −2.9217E+01 4.9182E+00 −4.5934E+00 2.3752E+00 −5.2342E−01R10 −4.1418E+01 2.7726E+00 −2.0687E+00 8.4787E−01 −1.4729E−01 R11−4.2960E+01 −4.8869E+00   3.3837E+00 −1.2891E+00   2.0819E−01 R12−1.1321E−01 −4.3434E−01   2.1263E−01 −5.5776E−02   5.8828E−03 R13−8.8011E+02 1.9278E−01 −1.1056E−01 3.3355E−02 −3.9704E−03 R14 6.1402E+00 −3.2100E−02   8.0571E−03 −1.0202E−03   5.1018E−05 R15−2.5715E+00 3.2304E−05 −4.4041E−06 7.6942E−08 −1.3297E−08 R16−4.3763E+02 2.5757E−05 −2.8976E−06 1.9661E−07 −3.1587E−09

Table 7 and table 8 show design data of inflexion points and arrestpoints of each lens of the camera optical lens 20 in Embodiment 2 of thepresent disclosure.

TABLE 7 Number(s) of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 1 1.225 / P1R2 1 0.945 / P2R1 2 0.905 1.015P2R2 0 / / P3R1 1 1.155 / P3R2 0 / / P4R1 1 0.175 / P4R2 0 / / P5R1 10.355 / P5R2 1 0.305 / P6R1 0 / / P6R2 1 1.175 / P7R1 0 / / P7R2 1 1.425/ P8R1 1 1.405 / P8R2 2 0.295 2.015

TABLE 8 Number(s) of Arrest point arrest points position 1 P1R1 0 / P1R20 / P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 0.275 P4R2 0 / P5R1 10.645 P5R2 1 0.515 P6R1 0 / P6R2 0 / P7R1 0 / P7R2 0 / P8R1 0 / P8R2 10.515

FIG. 6 and FIG. 7 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and436 nm after passing the camera optical lens 20 in Embodiment 2,respectively. FIG. 8 illustrates a schematic diagram of a fieldcurvature and a distortion of light with a wavelength of 546 nm afterpassing the camera optical lens 20 in Embodiment 2. A field curvature Sin FIG. 8 is a field curvature in a sagittal direction, and T is a fieldcurvature in a tangential direction.

As shown in the subsequent Table 13, the camera optical lens 20 inEmbodiment 2 satisfies the various conditions.

In this embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 20 is 2.621 mm, an image height (IH) of 1.0H is 2.500 mm,and a field of view (FOV) in the diagonal direction is 50.39°. Thus, thecamera optical lens 20 achieves large aperture, ultra-thinness and longfocal length, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

Embodiment 3

Embodiment 3, which provides a camera optical lens 30 structurally shownin FIG. 9 , is basically the same as Embodiment 1 and involves symbolshaving the same meanings as Embodiment 1, and only differencestherebetween will be described in the following.

Table 9 and Table 10 show design data of a camera optical lens 30 inEmbodiment 3 of the present disclosure.

TABLE 9 R d nd νd S1 ∞ d0= −0.519 R1 1.744 d1= 0.650 nd1 1.5444 ν1 55.82R2 12.960 d2= 0.050 R3 5.288 d3= 0.204 nd2 1.5444 ν2 55.82 R4 8.189 d4=0.052 R5 20.446 d5= 0.229 nd3 1.6701 ν3 19.39 R6 3.642 d6= 0.169 R7−65.348 d7= 0.286 nd4 1.5444 ν4 55.82 R8 34.802 d8= 0.221 R9 4.613 d9=0.360 nd5 1.6400 ν5 23.54 R10 5.489 d10= 0.369 R11 −10.127 d11= 0.242nd6 1.6701 ν6 19.39 R12 −8.562 d12= 0.326 R13 −14.63 d13= 0.250 nd71.5444 ν7 55.82 R14 −5.773 d14= 0.793 R15 −2.905 d15= 0.400 nd8 1.5346ν8 55.69 R16 16.849 d16= 0.297 R17 ∞ d17= 0.110 ndg 1.5168 νg 64.17 R18∞ d18= 0.405

Table 10 shows aspheric surface data of each lens of the camera opticallens 30 in Embodiment 3 of the present disclosure.

TABLE 10 Conic coefficient Aspheric surface coefficients k A4 A6 A8 A10A12 R1 −1.0109E+00  1.6940E−02 −8.7028E−03   6.5551E−02 −1.7264E−01  2.6872E−01 R2  3.7192E+01  1.1024E−02 −2.0467E−03  −1.9246E−03−9.8004E−04  −6.1059E−04 R3  3.5663E−01  2.1313E−03 −3.7904E−03 −5.5363E−03 −2.3325E−03   3.8775E−04 R4 −1.3885E+02 −5.4164E−021.9001E−01 −4.0908E−01 6.3062E−01 −7.2488E−01 R5 −1.0000E+03 −5.7512E−022.9291E−01 −6.0966E−01 9.3821E−01 −1.0603E+00 R6  2.7283E+00 −3.8988E−022.1063E−01 −4.7008E−01 1.0143E+00 −1.7120E+00 R7 −8.0534E+02  1.7197E−021.6647E−01 −3.6147E−01 9.1544E−01 −1.4423E+00 R8  7.2804E+02  5.3952E−031.2577E−01 −2.2521E−02 −3.0483E−01   1.3774E+00 R9 −2.2933E+01−1.1214E−01 9.2470E−02 −3.7324E−01 1.3537E+00 −3.2190E+00 R10−2.0715E+01 −1.2577E−01 4.5697E−02 −3.2577E−01 1.1045E+00 −2.2362E+00R11 −8.7766E+00 −8.9081E−02 −2.2046E−01   8.1556E−01 −2.3366E+00  4.2609E+00 R12  2.2351E+01 −8.0110E−02 −1.0140E−01   2.7801E−01−4.6313E−01   5.4710E−01 R13 −9.9192E+02 −1.1291E−01 −5.9082E−02  3.3550E−02 8.8322E−02 −1.9182E−01 R14  3.5515E+00 −1.0248E−02−1.1922E−01   1.4717E−01 −1.2052E−01   7.5567E−02 R15 −3.5888E+00−7.7608E−02 2.4645E−02 −3.3959E−03 4.4793E−04 −1.0031E−04 R16−9.9991E+02 −6.5748E−02 1.7617E−02 −4.1626E−03 7.4807E−04 −1.4231E−04Conic coefficient Aspheric surface coefficients k A14 A16 A18 A20 R1−1.0109E+00 −2.5900E−01   1.4975E−01 −4.7542E−02   6.3125E−03 R2 3.7192E+01 −2.4387E−04   2.6584E−04 8.2102E−06  1.6787E−05 R3 3.5663E−01 1.0659E−03  4.2995E−04 1.8157E−05  2.9891E−05 R4 −1.3885E+026.2338E−01 −3.5674E−01 1.1562E−01 −1.5714E−02 R5 −1.0000E+03 9.0394E−01−5.2809E−01 1.7866E−01 −2.6015E−02 R6  2.7283E+00 2.2810E+00 −1.9565E+009.0390E−01 −1.7242E−01 R7 −8.0534E+02 1.5999E+00 −1.1511E+00 4.4991E−01−6.9649E−02 R8  7.2804E+02 −2.9731E+00   3.5577E+00 −2.2326E+00  5.7162E−01 R9 −2.2933E+01 4.9176E+00 −4.5936E+00 2.3738E+00 −5.2325E−01R10 −2.0715E+01 2.7739E+00 −2.0692E+00 8.4789E−01 −1.4748E−01 R11−8.7766E+00 −4.8868E+00   3.3837E+00 −1.2893E+00   2.0808E−01 R12 2.2351E+01 −4.3429E−01   2.1254E−01 −5.5776E−02   5.8941E−03 R13−9.9192E+02 1.9277E−01 −1.1056E−01 3.3353E−02 −3.9897E−03 R14 3.5515E+00 −3.2165E−02   8.0676E−03 −1.0244E−03   5.2175E−05 R15−3.5888E+00 3.4116E−05 −3.5898E−06 1.3292E−07 −3.6041E−08 R16−9.9991E+02 2.5600E−05 −2.9741E−06 2.0189E−07  1.3576E−10

Table 11 and Table 12 show design data of inflexion points and arrestpoints of each lens in the camera optical lens 30 in Embodiment 3 of thepresent disclosure.

TABLE 11 Number(s) of Inflexion point Inflexion point inflexion pointsposition 1 position 2 P1R1 1 1.225 / P1R2 2 0.955 1.285 P2R1 2 0.8951.035 P2R2 0 / / P3R1 1 1.165 / P3R2 0 / / P4R1 1 0.205 / P4R2 0 / /P5R1 1 0.395 / P5R2 1 0.335 / P6R1 0 / / P6R2 1 1.165 / P7R1 0 / / P7R21 1.435 / P8R1 1 1.455 / P8R2 2 0.245 2.025

TABLE 12 Number(s) of arrest Arrest point position points 1 P1R1 0 /P1R2 0 / P2R1 0 / P2R2 0 / P3R1 0 / P3R2 0 / P4R1 1 0.315 P4R2 0 / P5R11 0.715 P5R2 1 0.575 P6R1 0 / P6R2 0 / P7R1 0 / P7R2 0 / P8R1 0 / P8R2 10.435

FIG. 10 and FIG. 11 illustrate a longitudinal aberration and a lateralcolor of light with wavelengths of 656 nm, 587 nm, 546 nm, 486 nm and436 nm after passing the camera optical lens 30 in Embodiment 3,respectively. FIG. 12 illustrates a schematic diagram of a fieldcurvature and a distortion of light with a wavelength of 546 nm afterpassing the camera optical lens 30 in Embodiment 3. A field curvature Sin FIG. 12 is a field curvature in a sagittal direction, and T is afield curvature in a tangential direction.

As shown in the subsequent Table 13, the camera optical lens 30 inEmbodiment 3 satisfies the various conditions.

In this embodiment, an entrance pupil diameter (ENPD) of the cameraoptical lens 30 is 2.666 mm, an image height (IH) of 1.0H is 2.500 mm,and a field of view (FOV) in the diagonal direction is 49.60°. Thus, thecamera optical lens 30 achieves large aperture, ultra-thinness and longfocal length, the on-axis and off-axis chromatic aberration issufficiently corrected, thereby achieving excellent optical performance.

TABLE 13 Parameters and conditions Embodiment 1 Embodiment 2 Embodiment3 f/TTL 0.97 0.98 0.99 f2/f 4.16 3.20 5.00 (R7 + R8)/(R7 − R8) 1.00 0.660.31 f 5.229 5.241 5.332 f1 3.677 3.708 3.612 f2 21.762 16.775 26.635 f3−6.665 −6.553 −6.570 f4 −34.088 −30.137 −41.493 f5 36.348 39.918 38.524f6 69.871 73.803 76.893 f7 14.848 15.960 17.270 f8 −4.311 −4.333 −4.583f12 3.191 3.099 3.211 FNO 2.00 2.00 2.00 TTL 5.400 5.368 5.413 FOV50.50° 50.39° 49.60° IH 2.500 2.500 2.500

The above-described are merely embodiments of the present disclosure. Itshould be noted that those of ordinary skill in the art can makeimprovements without departing from the inventive concept of the presentdisclosure, such improvements, however, fall within the protection scopeof the present disclosure.

What is claimed is:
 1. A camera optical lens comprising, from an objectside to an image side in sequence: a first lens, a second lens, a thirdlens, a fourth lens, a fifth lens, a sixth lens, a seventh lens, and aneighth lens; wherein the first lens has a positive refractive power, andthe camera optical lens satisfies conditions of:0.95≤f/TTL;3.20≤f2/f≤5.00; and0.30≤(R7+R8)/(R7−R8)≤1.00; where f denotes a focal length of the cameraoptical lens; f2 denotes a focal length of the second lens; R7 denotes acentral curvature radius of an object-side surface of the fourth lens;R8 denotes a central curvature radius of an image-side surface of thefourth lens; and TTL denotes a total optical length from an object-sidesurface of the first lens to an image surface of the camera optical lensalong an optical axis.
 2. The camera optical lens according to claim 1,wherein the camera optical lens further satisfies a condition of:−6.00≤R16/R15≤−2.50; where R15 denotes a central curvature radius of anobject-side surface of the eighth lens; and R16 denotes a centralcurvature radius of an image-side surface of the eighth lens.
 3. Thecamera optical lens according to claim 1, wherein the camera opticallens further satisfies conditions of:0.34≤f1/f≤1.06;−2.75≤(R1+R2)/(R1−R2)≤−0.87; and0.06≤d1/TTL≤0.18; where f1 denotes a focal length of the first lens; R1denotes a central curvature radius of the object-side surface of thefirst lens; R2 denotes a central curvature radius of an image-sidesurface of the first lens; and d1 denotes an on-axis thickness of thefirst lens.
 4. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies conditions of:−9.29≤(R3+R4)/(R3−R4)≤−1.81; and0.02≤d3/TTL≤0.06; where R3 denotes a central curvature radius of anobject-side surface of the second lens; R4 denotes a central curvatureradius of an image-side surface of the second lens; and d3 denotes anon-axis thickness of the second lens.
 5. The camera optical lensaccording to claim 1, wherein the camera optical lens further satisfiesconditions of:−2.55≤f3/f≤−0.82;0.70≤(R5+R6)/(R5−R6)≤2.16; and0.02≤d5/TTL≤0.07; where f3 denotes a focal length of the third lens; R5denotes a central curvature radius of an object-side surface of thethird lens; R6 denotes a central curvature radius of an image-sidesurface of the third lens; and d5 denotes an on-axis thickness of thethird lens.
 6. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies conditions of:−15.56≤f4/f≤−3.83; and0.03≤d7/TTL≤0.08; where f4 denotes a focal length of the fourth lens;and d7 denotes an on-axis thickness of the fourth lens.
 7. The cameraoptical lens according to claim 1, wherein the camera optical lensfurther satisfies following conditions:3.48≤f5/f≤11.42;−23.06≤(R9+R10)/(R9−R10)≤−6.45; and0.03≤d9/TTL≤0.10; where f5 denotes a focal length of the fifth lens; R9denotes a central curvature radius of an object-side surface of thefifth lens; R10 denotes a central curvature radius of an image-sidesurface of the fifth lens; and d9 denotes an on-axis thickness of thefifth lens.
 8. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies a condition of:6.68≤f6/f≤21.63;5.03≤(R11+R12)/(R11−R12)≤17.91; and0.02≤d11/TTL≤0.07; where f6 denotes a focal length of the sixth lens;R11 denotes a central curvature radius of an object-side surface of thesixth lens; R12 denotes a central curvature radius of an image-sidesurface of the sixth lens; and d11 denotes an on-axis thickness of thesixth lens.
 9. The camera optical lens according to claim 1, wherein thecamera optical lens further satisfies a condition of:1.42≤f7/f≤4.86;1.08≤(R13+R14)/(R13−R14)≤3.46; and0.02≤d13/TTL≤0.07; where f7 denotes a focal length of the seventh lens;R13 denotes a central curvature radius of an object-side surface of theseventh lens; R14 denotes a central curvature radius of an image-sidesurface of the seventh lens; and d13 denotes an on-axis thickness of theseventh lens.
 10. The camera optical lens according to claim 1, whereinthe camera optical lens further satisfies a condition of:−1.72≤f8/f≤−0.55;−1.41≤(R15+R16)/(R15−R16)≤−0.29; and0.04≤d15/TTL≤0.12; where f8 denotes a focal length of the eighth lens;R15 denotes a central curvature radius of an object-side surface of theeighth lens; R16 denotes a central curvature radius of an image-sidesurface of the eighth lens; and d15 denotes an on-axis thickness of theeighth lens.